As the article is more of an editorial than an opinionated piece, there is no essential argument to the piece, more an overview of the belief system and actions of two men, and their coworkers who support them in their endeavor. In this regard, Andreatta and Scott both feel that solving the issue of food production among the least technologically advanced members of the human race is essential to improving our species as a whole, as the emissions from the fires of these aboriginal peoples produce the same amount of carbon dioxide as a running car. Solving this issue is the primary purpose of Scott and Andreatta's quest to build a better stove for use in tribal environments.
Given the topic of the piece, as well as the nature of the publication that it was published in, it is reasonable to assume that the audience of this essay is liberal in their political persuasion, and could also be considered environmentally conscious. More than simply being conscious of their surroundings however, the reader of this sort of an article is most likely an active participant in efforts to stem the tide of environmental change, and promote a healthier planet through conscious efforts to inform the public of the harmful effects of climate change. This is evidenced by the sort of articles that this publications tends to feature, most of which are more politically radical than this.
In considering the effectiveness of the article in achieving its purpose, I am immediately inclined to say that it is extremely effective. This is the case primarily because it makes an effective claim to an audience that would most likely be willing to accept the claims and provisions that the article features, and able to affect the specific sort of change that the article promotes. The article features evidence of both the empirical and the data-driven sort, and effectively makes a two-pronged argument, which centers around the engineering efforts of a small group of dedicated men and women, and the positive effects of their actions. As is pretty typical for publications of this sort, the focus of the essay could also be considered the need for greater action to occur, while effectively striking a delicate balance between a concerted call to action, and a celebration of successful efforts already undertaken. In this way, the article succeeds tremendously in accomplishing its purpose.